How did Douglass feel when he finally made it to a free state?

From the text:

I have been frequently asked how I felt when I found myself in a free State. I have never been able to answer the question with any satisfaction to myself. It was a moment of the highest excitement I ever experienced. I suppose I felt as one may imagine the unarmed mariner to feel when he is rescued by a friendly man-of-war from the pursuit of a pirate. In writing to a dear friend, immediately after my arrival at New York, I said I felt like one who had escaped a den of hungry lions. This state of mind, however, very soon subsided; and I was again seized with a feeling of great insecurity and loneliness. I was yet liable to be taken back, and subjected to all the tortures of slavery.